Year	Percent
1973-01-01	0.44713800000000004
1974-01-01	0.47697399999999995
1975-01-01	0.37594099999999997
1976-01-01	0.32184500000000000
1977-01-01	0.29379600000000000
1978-01-01	0.45791499999999996
1979-01-01	0.37465600000000000
1980-01-01	0.42771400000000004
1981-01-01	0.41870700000000000
1982-01-01	0.53922300000000000
1983-01-01	0.56153100000000000
1984-01-01	0.37529100000000000
1985-01-01	0.36322200000000000
1986-01-01	0.30657500000000000
1987-01-01	0.19255500000000000
1988-01-01	0.17121000000000000
1989-01-01	0.17121000000000000
1990-01-01	0.17121000000000000
1991-01-01	0.17121000000000000
1992-01-01	0.17121000000000000
1993-01-01	0.17121000000000000
1994-01-01	0.17121000000000000
1995-01-01	5.16463000000000100
1996-01-01	4.53055000000000000
1997-01-01	4.50555000000000000
1998-01-01	5.61011999999999900
1999-01-01	0.11024100000000000
2000-01-01	0.10016200000000000
2001-01-01	1.63880999999999990
2002-01-01	1.82127000000000020
2003-01-01	1.92947000000000000
2004-01-01	1.90245999999999980
2005-01-01	4.79898000000000000
2006-01-01	4.26296000000000000
2007-01-01	4.92186999999999900
2008-01-01	3.98420000000000000
2009-01-01	3.50879000000000030
2010-01-01	3.76082000000000000
2011-01-01	2.16269000000000000
2012-01-01	1.58497999999999980
2013-01-01	2.71427000000000000
2014-01-01	1.64567000000000000
2015-01-01	1.74902999999999990
2016-01-01	2.53162000000000000